54564721 has 4 divisors (see below), whose sum is σ = 55833712. Its totient is φ = 53295732.

The previous prime is 54564703. The next prime is 54564737. The reversal of 54564721 is 12746545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54564721 - 2⁷ = 54564593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54564701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634431 + ... + 634516.

It is an arithmetic number, because the mean of its divisors is an integer number (13958428).

Almost surely, 2^54564721 is an apocalyptic number.

It is an amenable number.

54564721 is a deficient number, since it is larger than the sum of its proper divisors (1268991).

54564721 is a wasteful number, since it uses less digits than its factorization.

54564721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268990.

The product of its digits is 33600, while the sum is 34.

The square root of 54564721 is about 7386.7936887394. The cubic root of 54564721 is about 379.2893481746.

The spelling of 54564721 in words is "fifty-four million, five hundred sixty-four thousand, seven hundred twenty-one".